Reported Resistance Case(s)

Species: hypera postica

Order	Family	Common Name(s)	Group	Host
coleoptera	curculionidae	alfalfa weevil	AG	alfalfa

Active Ingredient: heptachlor

MOA: GABA-gated chloride channel antagonists, Cyclodiene organochlorines
Group: CYCLO	CAS #: 76-44-8	Shaugnessy Code: 44801

Resistance Case(s)

Case Id	Year of Report	Type of Resistance	Location	Reference
G1750	1971	Field Evolved Resistance	USA-- Delaware	Brown, A. W. A. (1971). Pest resistance to pesticides.. In: ""Pesticides in the Enviroment,"" ed. White-Stevens,, 1 457-552.
G1507	1969	Field Evolved Resistance	Armenia	Mardzhanyan, G. M., Ust Yan, A. K. and Manukya, Z. S. (1969). Population changes of the alfalfa weevil Phytonomus variables (Coleoptera: Curculionidae) in relation to its resistance to BHC in the Ararat Valley of Armenia.. Entomol. Obozrenie, 48 755-60.
G1168	1967	Field Evolved Resistance	USA-- Pennsylvania	(1967). Report of the First Session of the FAO Working Party of Experts on Resistance of Pests to Pesticides.. FAO, Rome 1965.
G592	1965	Field Evolved Resistance	USA-- North Carolina	Campbell, W. V. (1965). In: FAO 1967.
G441	1964	Field Evolved Resistance	USA-- California	Adler, V. E. and Blickenstaff, C. C. (1964). Resistance of the alfalfa weevil to heptachlor.. J. Econ Entomol., 57 299-300.
G442	1964	Field Evolved Resistance	USA-- Maryland	Adler, V. E. and Blickenstaff, C. C. (1964). Resistance of the alfalfa weevil to heptachlor.. J. Econ Entomol., 57 299-300.
G443	1964	Field Evolved Resistance	USA-- Montana	Anon. (1964). U.S.. Dept. Agric. In: Brown 1971.
G444	1964	Field Evolved Resistance	USA-- New York	Adler, V. E. and Blickenstaff, C. C. (1964). Resistance of the alfalfa weevil to heptachlor.. J. Econ Entomol., 57 299-300.
G445	1964	Field Evolved Resistance	USA-- Utah	Anon. (1964). U.S.. Dept. Agric. In: Brown 1971.
G446	1964	Field Evolved Resistance	USA-- Virginia	Adler, V. E. and Blickenstaff, C. C. (1964). Resistance of the alfalfa weevil to heptachlor.. J. Econ Entomol., 57 299-300.
G447	1964	Field Evolved Resistance	USA-- Wyoming	Anon. (1964). U.S.. Dept. Agric. In: Brown 1971.
G448	1964	Field Evolved Resistance	USA-- Nevada	Adler, V. E. and Blickenstaff, C. C. (1964). Resistance of the alfalfa weevil to heptachlor.. J. Econ Entomol., 57 299-300.

*The population was created solely by selection and/or genetic manipulation.
**The population was selected further in the laboratory after collection.